Constructional material



-P a .tented July 1, 1936 ALBERT o. FISCHER,

. Drawing.

01'! CHICAGO, ILLINOIS, ASSIGNOB TO THE PHILIP CAREY-MANU- FACTURINGCOMPANY, A CQRPORATION OF OHIO consrnuc'nonar. MATERIAL This inventionrelates to constructional material, such as, roofing material,insulating material, tapes, shingles, packing and the e. The object ofmy'present invention is to provide such constructional materials with anadhesivecoating which is normally sticky or tacky tothe touch and whichlastingl-y maintains this mastic condition whereby the material may bepackedand stored for long periods of time without losing its tackinessand may be transported to its place of installation and. used in suchtacky condition without further treatment.

A further object of my invention resides in the application of thisnormally lasting- .,transportation, they may pulle 1y adhesive, stickyto the touch, to sheets or strips of carrier material, hereinaftercalled vehicles, so that when rolled into package form or placed face toface in contact with a similar sheet for packing and storing and beunrolled or apart readily without tearing or damand'can be installed intacky condition; in this instance the tacky coating permits the facileseparation of the contacting vehicle surfaces, the line of cleavagepassing througlithe mastic itself. The vehicle thus provided with alasting adhesive, mastic coating is particularly adapted to act as apacking for various types of installations,

aging,

I not only because of the waterproofing quality of the mastic but alsobecause of its pronounced and lasting quality of adhesiveness andfurther because of its plasticity.

A further object of my invention resides in providing a constructionalmaterial which includes a vehicle saturated with a bituminous adhesive,such saturant being treated with an overcoating of a viscous adhesive,which will be separable along the lines of such coating, whereby thevehicles when so coated may be separable from objects to which theyadhere or from similar vehicles. In the present invention the vehiclemay consist of sheets, strips, or slabs of tar paper, felt, fabric,fibers or other preferred material. I

This saturant may also be a single vegetable or bituminous adhesive,such as, coting consistencies,

Application filed August 15, 1927. Serial No. 213,188.-

tonseed, Foots pitch or road oil, sludges and semi-liquid, bituminoussubstances of varysuch saturants, where treated with an overcoating ofaviscous vegetable or combination vegetable and bituminous adhesive willbe separable along the lines of such coating.

The coating with which the vehicle is thus saturated on either one orboth sides preferably comprises a slow-drying, tacky, bituminous,vegetable'or animal adhesive or combination of two or more, whichapproximates the following specifications, or may be more or less fluid.

(1) The consistency at 77 F. should be below 7.0.

(2) The susceptibilit factor should be as low as possible, prefera lyunder 25.

(3) -The ductility at 77 F. should be as high as possible and preferablyover 25 centimeters.

(4) Fusing point by K and S method should be between 80 and'100 F.

. (5) It should appear tacky and adhesive at normal temperature andretain this property as long as possible on exposure to air.

This formula is merely'a standard and other formulas more or less fluidmay be used with or without a suitable filleras a flow retarder, or theflow tendency may be stopped by using a non-flowing gummy substance in.

combination.

It will be understood that my invention contemplates constructionalmaterial, the adhesiveness of which serves to hold said material inplace in distinction to other materials which involve the use of pitch,or other material, mopped on at the time of assembling the material.This is especially true in the application of the invention to roofingsheets, for the purpose of holding the sheets of roofing material inplace. that after two sheets of building material according to thepresent invention have been separated, the adhesive surface of one sheetwill be placed in contact with the non-adhesive surface of another"sheet. The adhesive or mastic will cause a union with non-adhesivesurfaces to which is applied, which union may be made very egcellent bymeans It will be understood of rolling and which will improve in thecourse of time. It will also be understood that if it should be foundthat the adhesive surface of a sheet should become dried out, a solventsuch as toluol, benzol, kerosene, or cotton oil, may be used to bringthe sheet back into adhesive state. The subject matter of thisapplication has been withdrawn from my prior Patent No.

1,550,310, issued August 18, 1925.

I claim: a

1. Constructional material comprising a. vehicle saturated with a roadoil of bituminous nature, and coated with a normally viscous bituminousadhesive which is separa ble along the lines of such coating fromcontact with another sheet.

2. Constructional material comprising a vehicle saturated with asemi-liquid bituminous substance and coated with a normally viscousbituminous adhesive which is adapted to be separated along the lines ofsuch coating from contact with another sheet.

3. Constructional material comprising a vehicle saturated with abituminous adhesive and treated with an overcoating of normally viscousadhesive, separable along the lines 0; such coating from contact withanother S eet.

Signed at Chicago, Illinois, this 9th day of August, 1927. ALBERT G.FISCHER.

